When there
are some physical, chemical or biological changes occur in
our physical environment it is known as pollution and the
substances which brings these changes are known as
pollutants. The sources for the pollution can be natural or
man made.

Following are the types of Environmental pollution.

1.Air
pollution

2.Water
pollution

3.Soil
pollution

4.Noise
pollution

5.Marine
pollution

6.Thermal
pollution

7.Nuclear
pollution

Air pollution:When some foreign particles enters the air and deteriorate its quality
is known as air pollution. These particles can be produced
naturally or man made. Dust storms, Bacteria and gases of
volcanic eruptions are examples of natural’s sources of
pollutants. Gases released from the automobile and the
chimneys are the example of man made pollutants.

Marine pollution: Human being has polluted the oceans by adding the oil and waste
disposal in it. The main causes of marine pollution are
shore based industries, off-shore drilling, wrecked oil
tankers and transport activities. Also the waste discharged
into the rivers that flows to the ocean is the main reason
of marine pollution. Marine pollution has adversely affected
the sea life.

Major sources:
Transport, oil tankers and industries.

Thermal pollution: It is an increase in the water temperature due to industrial operations
(steel industries and power plants). Many industries are
using water as a coolant. Due to which the temperature of
the water rises. This hot water is then discharged into the
environment causing a warming of surface water. This can
result in a permanent increase in water temperature. It can
also affect the aquatic system.

Major sources: Steel Industries, Power plants and nuclear power plants

Nuclear pollution: Pollution caused by the radioactive waste material due to nuclear
explosion is known as nuclear pollution. It can give rise to
diseases like skin cancer. Due to the increased numbers of
nuclear plants the nuclear waste disposal has become a
threat for the environment.